Introduction:
Example code:
import java.lang.reflect.*;
public class ReflectFrameworkExample {
public static void main(String[] args) throws Exception {
Class<?> clazz = Class.forName("com.example.MyClass");
Field field = clazz.getDeclaredField("name");
field.setAccessible(true);
Object obj = clazz.newInstance();
field.set(obj, "John Doe");
String name = (String) field.get(obj);
System.out.println("Field value: " + name);
Method method = clazz.getDeclaredMethod("printMessage", String.class);
method.setAccessible(true);
method.invoke(obj, "Hello World!");
Object newObj = clazz.newInstance();
System.out.println("New object: " + newObj);
}
}
class MyClass {
private String name;
public void printMessage(String message) {
System.out.println("Message: " + message);
}
}
In this example, we first obtain the Class object for the "MyClass" class using either `Class.forName()` or `.class` keyword. Then, we use reflection to access the private field "name" and set its value. We also invoke a method "printMessage" with a string parameter. Finally, we create a new instance of the class using the `newInstance()` method.
Conclusion:
